From: Harry Yoo <harry.yoo@oracle.com>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: Petr Tesarik <ptesarik@suse.com>,
Christoph Lameter <cl@gentwo.org>,
David Rientjes <rientjes@google.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
Hao Li <hao.li@linux.dev>,
Andrew Morton <akpm@linux-foundation.org>,
Uladzislau Rezki <urezki@gmail.com>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Suren Baghdasaryan <surenb@google.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Alexei Starovoitov <ast@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-rt-devel@lists.linux.dev, bpf@vger.kernel.org,
kasan-dev@googlegroups.com
Subject: Re: [PATCH RFC v2 04/20] slab: add sheaves to most caches
Date: Fri, 16 Jan 2026 15:46:27 +0900 [thread overview]
Message-ID: <aWnewyp0L0WRUPud@hyeyoo> (raw)
In-Reply-To: <20260112-sheaves-for-all-v2-4-98225cfb50cf@suse.cz>
On Mon, Jan 12, 2026 at 04:16:58PM +0100, Vlastimil Babka wrote:
> In the first step to replace cpu (partial) slabs with sheaves, enable
> sheaves for almost all caches. Treat args->sheaf_capacity as a minimum,
> and calculate sheaf capacity with a formula that roughly follows the
> formula for number of objects in cpu partial slabs in set_cpu_partial().
>
> This should achieve roughly similar contention on the barn spin lock as
> there's currently for node list_lock without sheaves, to make
> benchmarking results comparable. It can be further tuned later.
>
> Don't enable sheaves for bootstrap caches as that wouldn't work. In
> order to recognize them by SLAB_NO_OBJ_EXT, make sure the flag exists
> even for !CONFIG_SLAB_OBJ_EXT.
>
> This limitation will be lifted for kmalloc caches after the necessary
> bootstrapping changes.
>
> Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
> ---
Looks good to me,
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
--
Cheers,
Harry / Hyeonggon
next prev parent reply other threads:[~2026-01-16 6:48 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-12 15:16 [PATCH RFC v2 00/20] slab: replace cpu (partial) slabs with sheaves Vlastimil Babka
2026-01-12 15:16 ` [PATCH RFC v2 01/20] mm/slab: add rcu_barrier() to kvfree_rcu_barrier_on_cache() Vlastimil Babka
2026-01-13 2:08 ` Harry Yoo
2026-01-13 9:32 ` Vlastimil Babka
2026-01-13 12:31 ` Harry Yoo
2026-01-13 13:09 ` Vlastimil Babka
2026-01-14 11:14 ` Harry Yoo
2026-01-14 13:02 ` Vlastimil Babka
2026-01-15 23:52 ` Suren Baghdasaryan
2026-01-14 4:56 ` Harry Yoo
2026-01-12 15:16 ` [PATCH RFC v2 02/20] mm/slab: move and refactor __kmem_cache_alias() Vlastimil Babka
2026-01-13 7:06 ` Harry Yoo
2026-01-16 0:06 ` Suren Baghdasaryan
2026-01-12 15:16 ` [PATCH RFC v2 03/20] mm/slab: make caches with sheaves mergeable Vlastimil Babka
2026-01-13 7:47 ` Harry Yoo
2026-01-16 0:22 ` Suren Baghdasaryan
2026-01-16 7:24 ` Vlastimil Babka
2026-01-16 8:46 ` Harry Yoo
2026-01-16 11:01 ` Vlastimil Babka
2026-01-16 11:10 ` Harry Yoo
2026-01-16 16:58 ` Suren Baghdasaryan
2026-01-12 15:16 ` [PATCH RFC v2 04/20] slab: add sheaves to most caches Vlastimil Babka
2026-01-16 5:45 ` Suren Baghdasaryan
2026-01-16 11:24 ` Vlastimil Babka
2026-01-16 16:59 ` Suren Baghdasaryan
2026-01-16 6:46 ` Harry Yoo [this message]
2026-01-12 15:16 ` [PATCH RFC v2 05/20] slab: introduce percpu sheaves bootstrap Vlastimil Babka
2026-01-13 12:49 ` Hao Li
2026-01-15 10:11 ` Vlastimil Babka
2026-01-16 7:29 ` Harry Yoo
2026-01-12 15:17 ` [PATCH RFC v2 06/20] slab: make percpu sheaves compatible with kmalloc_nolock()/kfree_nolock() Vlastimil Babka
2026-01-13 15:42 ` Hao Li
2026-01-15 11:07 ` Vlastimil Babka
2026-01-13 18:36 ` Sebastian Andrzej Siewior
2026-01-13 23:26 ` Alexei Starovoitov
2026-01-14 13:57 ` Vlastimil Babka
2026-01-14 14:05 ` Vlastimil Babka
2026-01-14 15:07 ` Sebastian Andrzej Siewior
2026-01-12 15:17 ` [PATCH RFC v2 07/20] slab: handle kmalloc sheaves bootstrap Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 08/20] slab: add optimized sheaf refill from partial list Vlastimil Babka
2026-01-15 14:25 ` Vlastimil Babka
2026-01-16 6:27 ` Hao Li
2026-01-16 7:32 ` Vlastimil Babka
2026-01-16 7:56 ` Hao Li
2026-01-12 15:17 ` [PATCH RFC v2 09/20] slab: remove cpu (partial) slabs usage from allocation paths Vlastimil Babka
2026-01-14 6:07 ` Hao Li
2026-01-15 13:53 ` Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 10/20] slab: remove SLUB_CPU_PARTIAL Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 11/20] slab: remove the do_slab_free() fastpath Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 12/20] slab: remove defer_deactivate_slab() Vlastimil Babka
2026-01-15 14:09 ` Hao Li
2026-01-15 14:47 ` Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 13/20] slab: simplify kmalloc_nolock() Vlastimil Babka
2026-01-14 3:31 ` Alexei Starovoitov
2026-01-12 15:17 ` [PATCH RFC v2 14/20] slab: remove struct kmem_cache_cpu Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 15/20] slab: remove unused PREEMPT_RT specific macros Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 16/20] slab: refill sheaves from all nodes Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 17/20] slab: update overview comments Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 18/20] slab: remove frozen slab checks from __slab_free() Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 19/20] mm/slub: remove DEACTIVATE_TO_* stat items Vlastimil Babka
2026-01-12 15:17 ` [PATCH RFC v2 20/20] mm/slub: cleanup and repurpose some " Vlastimil Babka
2026-01-12 15:20 ` [PATCH v2 00/20] slab: replace cpu (partial) slabs with sheaves Vlastimil Babka
2026-01-15 15:12 ` [PATCH RFC " Vlastimil Babka
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